BOILER FEED WATER

Boiler feed water is used to produce steam.

The pressure of the steam (0,5 - 100 bar) determines the temperature and energy capacity, but also the quality of the feed water.

The general rule is the higher the pressure the more strict the quality of the boiler feed water.
Problems caused by impurities in the feed water are:

• Scaling
• Corrosion
• Priming (formation of droplets)
• Carryover in the steam (of volatile minerals)

Important parameters of the feed water are:

• pH
• Hardness
• Oxygen and carbondioxide concentration
• Silicates
• Dissolved solids
• Suspended solids
• Concentration organics

The installation to produce boiler feed water use an array of water treatment techniques like:

• Reversed osmosis 
• Ion exchangers 
• Chemical dosing